Definitions of rust:

  • noun:   any of various fungi causing rust disease in plants
  • noun:   the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
  • noun:   a reddish-brown discoloration of leaves and stems caused by a rust fungus
  • noun:   a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture
  • verb:   become coated with oxide
  • verb:   become destroyed by water, air, or an etching chemical such as an acid
    Example: "The pipes rusted"
  • verb:   cause to deteriorate due to the action of water, air, or an acid
    Example: "The steady dripping of water rusted the metal stopper in the sink"
  • adjective:   of the color of rust
  • name:  A surname (rare: 1 in 25000 families; popularity rank in the U.S.: #3101)